I am cheap and I got lucky. When I built mine I got a bunch of 6' tall chain link from the local junk yard. A couple of dings and a little rust but I don't mind it. Framed the chain link in 10' sections. One set went across the top of the run. 10' x 30' run. Yes, it is bare dirt inside, but I no longer pay for fertilizer and had some of the biggest tomato plants ever last year. For the coop, I have a buddy that owns a mill and he gave me a pallet of older oak lumber that had been out in the weather. Still had to buy screws and I bought treated lumber to frame the sections in with. I also used 2 reclaimed double pain windows to give them some light and passive heat inside the coop. I also used a bunch of free and left over lumber for my chicken tractor along with more of the chain link I had already gotten. Even so, I have found one possum in my big coop with NO idea how it found a way in. There were no dig in spots.